Rotary motor



Feb. 3. 1925. 1,525,364

J. J. BRETT ROTARY MOTOR Filed Oct. 26, 1920 3 Sheets-Sheet 1 IN VEN TOR James J. Brett.

BY C W CDT) ATTORNEY Feb. 3. 1925. 1,525,364

J. J. BRETT ROTARY MOTOR 5 Sheets-Sheet 2 Filed Oct. 26, 1920 19 VENTOR 188 James J. Brett.

Feb. 3. 1925.

1,525,364 J. J. BRETT ROTARY MOTOR Filed Oct. 26, 1920 3 Sheets-Sheet 5 I 1 i I\\\\\\\ 0 9 0 INVENTOR James .7. Brett.

(AOL 87 m1 "ATTORNEYS -PATENT OFFICE.

JAMES J. BRETT, OI OAKLAND, CALIFORNIA.

many MOTOR.

Application filed October 26, 1920. Serial No. 419,858.

To all whom it may concern:

Be it known that I, JAMES J. Bnn'rr, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Rotary Motors,-of which the following is a specification.

My invention is an im roved'rotary gas motor which is highly e cient in operation and easy to assemble'and take apart.

Referring to the annexed drawing in which my invention is illustrated and which forms a part of this specification Figure 1 is an elevation of one end of my rotary gas engine.

Figure 2 is an elevation of the other end of my rotary gas engine.

Figure 3 is a transverse vertical section of my rotary engine taken on line 3-3 of Figure 4. 9

Figure 4 is a longitudinal vertical section of my rotary gas engine.

Figure 5 is a sectional view taken on line 5--5 of Figure 3.

Figure 6 is a sectional view taken on line 66 of Figure 3.

Figure 7 is an view of the piston.

Figure 8 is a perspective of one of the explosion chamber partitions.

Figure 9 is a perspective of one of the partition packings.

Figure 10 is a diagrammatic view of the sparking circuit.

In the drawings, 1 indicates a stationary tubular shaft mounted in the upper end of a standard 2. The outer end of said shaft is'connected to a carburetor 3. A cylinder 4 is journaled on the shaftl by means of bearings 5 and 6 on the cylinder heads 7 and 8 which are bolted to the ends of the cylinder by bolts 9 and 10. "The cylinder is formed with an inner piston enclosing wall 11 and an outer wall 12. An eccentric 13 is secured on the shaft 1 within the cylinder 4. A rotary iston 14 is journaled on the eccentric 13 y ball bearings 15 and 16. Said piston includes an annular wall 17 and end walls 18 and 19 of slightly larger diameter than the wall 17, forming annular grooves 20, 21 and 23 around the piston, which grooves are divided off by three equally spaced embossments 24, 25 and 26. The outer side of the piston end walls 18 and 19 is provided with annular grooves 27 and 28 near the periphery thereof in which are fitted packing rings 29 and 30 which bear against the inner surface of the heads 7 and 8. Springs 31 are mounted in the piston end walls which urge the packing rings 29 and 30 outwardly against the cylinder heads. The outer side of the piston end wall 18 is provided with recesses 32 in which rest cranks 33, one end 34 of said cranks being journaled in said iston end wall and the other end 35 being ournaled in the cylinder head 7, said cranks causing the cylinder to rotate with the piston, but allowing a slight relative rotative movement of the cylinder and piston to enable the piston 14 to assume its various eccentric ositions with relation to the cylinder. B0 ts 32' are secured to the sidewalls 7 and 8, and pass through openings 32 in the piston 14.

In the inner cylinder wall 11 are-a plurality of inlet ports 36, 37 and 38 and a lurality of exhaust ports 39, 40 and 41. A 01- low hub has an external flange 46 and is secured to the center of the cylinder head 7 by screws 47 which extend through said flange and engage said head. A journal 48 is secured centrally .to the hub 45 and is mounted in a bearing 49. Ducts 50, 51 and 52 connect the ports 36, 37 and 38 respectively to the hub 45. Outlet ducts 53, 54 and 55 are connected to the exhaust ports'39, 40 and 41. The inlet ports 36, 37 and 38 are controlled by valves 56, 57 and 58 respectively.

The exhaust ports 41, 39 and 40 are controlled by valves 59, 60 and 61 respectively. a

The piston 14 is formed with three bearings 65,. 66 and 67 openin through the periphery thereof, in which hearings are journals 68, 69 and. 70 to which the'inner ends of partitions 71, 72 and 7 3 are secured, said partitions extending outwardly through the open side of said bearings. Bearin s 75, 76 and 77 are formed in the cylinder 4 etween the inner and outer cylinder walls 11 and 12, said bearings opening inwardly through the inner wall 11 into the piston chamber. In said bearings are journals 78, 79 and 80 which are provided with slots 81, 82 and 83 which recelve the partitions 71, 72 and 73 res ectively, and form sliding bearings for sai partitions. The side edges of said partitions and the ends of the ]0LlI'Il9.lS'68, 69 and 70 are provided with grooves 84 to receive metal paokings 85, and the ends of said journals are rovided with recesses 86 to receive heads 8 on the inner ends of said partitions of said heads engaging the ed e 88 preventing longitudinal displacement 0 said wall 11 between the packings in the partition grooves 84. The partitions 71, 72 and 73 are provided with bores 89 extending from the inner wall of the grooves 84 in which bores are springs 90 which yieldingly maintain the packings 85' in engagement with the inner surface of the cylinder heads 7 and 8. The journals 78, 79 and 80 fit closely in their bearings and against the cylinder heads, and in conjunction with the packings prevent leakage plosion chamber 91. A spark plug 96 is wall 11 mounted in the cylinder wall 11 between the inlet and exhaust ports 37 and 40 for explod- A bearing at one end against the bearing 145 ing the gas in the explosion chamber 92. spark plug 97 is mounted in the cylinder between the inlet and exhaust ports 38 and 41 for exploding the gas in the explosion chamber 93.

The stem 100 of the inlet valve 56 projects outwardly through the wall of the duct 50. A spring 101 secured to the inner side of the cylinder wall 12 and connected to the outer end of the valve stem 100 normally closes the valve 56. The stem 102 of the valve 57 projects outwardly through the wall of the duct 51 and is connected at its outer end to a spring 103 secured to the inner side of the cylinder wall 12 whereby the valve is normally held closed. The stem 104 of inlet valve 58 projects outwardly through the wall of duct 52 and is con nected at its outer end to a spring 105 secured to the inside of cylinder wall 12, said normally maintaining said valve The stem 106 of exhaust valve 59 rojects outwardl through the wall of exhaust duct 54 an is connected at its outer end to a spring 107 which is secured to the inside of the cylinder wall 12, said spring snrin c ose normally holding said valve closed. The stem 108 of exhaust valve 60 projects outwardly through the wall of exhaust duct 55 and is connected at its outer end to a spring 109 secured to the inside of cylinder wall 12, which spring normally maintains said valve closed. The stem 110 of exhaust valve 41 projects outwardly through the wall of exhaust duct 53 and'is connected at its outer end to a spring 111 secured to the inside of the cylinder wall 12, which spring normally holds said valve closed.

Levers 115, 116, 117, 118, 119 and 120 are respectively pivoted-to brackets 121, 122, 123, 124, and 126 secured to the ins de of cylinder wall 12. A cylindrical casing 130 is detachably secured to the outside of the cylinder head 8 by screws 131 which extend through an external flange 132 on the inner edge of said easing into said head,

the casing being provided with an opening 133 through which the shaft 1 extends. In the forward part of the casing 130 is journaled an internal gear 135 concentric with the shaft 1. Shafts 136, 137, 138, 139, and 141 are journaled at one end in the cylinder head 8 and at the other end in the end wall of the casing 130. On the shaft 136 within the casing 130- are secured a pinion 142, which meshes with gear 135, and a cam 143 which engages the inner end of a tappet rod 144 which extends through the cylindrical wall of the casing 130 and is mounted in a guide 145 on the outside of cylinder head 8. The outer end of said tappet rod is connected to the outer end of the lever 115 which extends through an opening 146 in the cylinder head 8. A spring 147 surrounds the tapped rod 144,

and at its other end against a collar 148 on said rod, said spring maintaining the rod in engagement with the cam 143. On

said tappet being connected to the outer end of lever 116 which projects through an opening 154 in the head 8. A spring 155 surrounds the tappet 152, hearing at one' end against the bearing 153 and at its other end against a collar 156 on the tappet, said spring maintaining the inner end of the tappet in engagement with the cam 151. On the shaft 138 are secured a pinion 160, which meshes with the gear 135, and a cam 161 which meshes with the inner end of a tappet 162 which extends through the cy indrical wall of the casing 130 and through a bearing 163 on the outside of cylinder head 8, the tappet being connected at its outer end to the outer end of, the Valve lever 117 which extends through an opening 164 in the cylinder head 8. A spring 165 surrounds the tappet 162, bearing at one end against the bearing 163 and at the other end against a collar 166 on the tappet, said spring maintaining the inner end of the tappet in engagement with the cam 161. On the shaft 139 are secured a pinion 17 0 meshing with the gear 135 and a cam 171 which engages the inner end of a tappet 172 which extends through the cylindrical wall of the casing 130and through a bearing 173 on the outside of the cylinder head 8, the outer end of said tappet being connected to the. outer end of the valve lever 118 which extends through the ope'ning 146. A spring 17 4 surrounds the tappet 172, hearing at one end against the bearing 17 3 and at its other end against a collar 175 secured on said tappet, said spring maintaining the. inner end of the tappet in engagement with the cam 171. On the shaft 140 are secured a pinion 180, which meshes with the gear 135, and a cam 181 which engages the inner end of a tappet 182 which extends through the cylindrical wall of the casing 130 and through a bearing 183 on the outside of the cylinder head 8, the outer end of said tappet being connected to the outer end of the valve lever 119, which extends through opening 154. A spring 184 surrounds the tappet 182, hearing at one end against the bearing 183 and at its other end against a collar 185 on'said tappet, said spring maintaining the inner end of the tappet in engagement with the cam 181.- On the shaft 141 are secured a pinion 190, which meshes with the gear 135, and a cam 191 WlllGh engages the inner end of a tappet 192 which extends through the cylindrical wall of the casing 130 and through the bearing 193 on the outside of the cylinder head 8, the outer end of said tappet being connected to the outer end of the valve lever 120 which projects through the opening 164. A spr1ng 194 surrounds the tappet 192, bearing at one end against the bearing 193 and at 1ts other end against a collar 195 on the tappet, said spring maintaining the inner. end of the tappet in engagement with the cam 191. On the shaft 1 outside of the casing 130 is secured a pinion 196which mesheswith a gear 197 on the outside end of pinion and cam shaft 139 and also with a gear 198 on the outside end of pinion and cam shaft 137 whereby the internal gear 135 through pinions 170 and 150 is rotated to rotate the pinions 142, 180, 190, and 160.

1 Three collector rings 200, 201 and 202 are secured on the shaft 1 between the hub and the bearing 49 which rings are wiped b I brushes 203, 204 and 205 respectively.

- direction.

distributor 206 has three contacts 207, 208

and 209 which are respectively connected by leads 210, 211 and 212 to the brushes 200, 201 and 202. Said distributor has a rotar contact 213 which wipes the contacts 20 208 and 209. A generator 215 has one of its brushes 216 connected by a lead 217 to the distributer rotary contact 213, the other brush 218 being grounded at 219. A lead 220 connects collector ring 200 and spark plug 95. A lead 221 connects ring 201 to spark plug 96. A lead 22 connects ring 202 and spark plug 97. The spark plugs 95, 96 and 97 are grounded at 225,-

The operation of m motor is as follows:

The cylinder 4 is or by a starter (not shown) in a clockwise (See Fig. 3.) The cam 143 raises the tappet 144 which in turn through the medium of lever 115 opens the inlet valve 56 and admits gas from the carburetor 3 into the explosion chamber 91. At this rst rotated manually time distfbuter contact 213 wipes contact 207 and the spark plug 95 ignites the charge in said explosion chamber which gives the piston and cylinder a clockwise. impulse and causes the piston to change its eccentric position with relation to the piston whereby the area of the explosion chamber 91 is expand ed and the area of the explosion chamber 92 contracted. At the end of the explosion in chamber 91 the cam 171 raises the tappet 1 72 and through the medium of the lever 118 opens the exhaust valve 59 and exhausts the chamber 91.

The cam 151 then raises tappet 152 which through the medium of lever 116 opens inlet valve 57 and admits .a charge of gas in the contracted explosion chamber 92. At this time the distributer contact 213 wipes contact 208 and causes spark plug 96 to i to the charge in chamber 92, which exp odes the gas in said chamber andgives the piston and cylinder a clockwise impulse, causing the piston to change its eccentric position in the cylinder, whereby the area of the chamber 92 is expanded and the area of the chamber 93 is contracted. The cam 181 then through the medium of tappet 182 and lever 119 opens the exhaustvalve 60 and exhausts the products of combustion in the chamber 92.

The cam 161 then raises the tappet 162- andopens the inlet valve 58 and admits a tappet 192 and opens the exhaust valve 61 and exhausts the products of combustion from the explosion chamber 93. ,During the operation of the motor, the partitions 71, 72 and 73 slide in and out of the slots 81, 82 and 83, and the journals'68, 78., 69, 79, 70 and oscillate in their bearings to accommodate the various eccentric positions of the piston in the cylinder.

This completes the cycle of operations of the motor.

Having described my invention, I claim:

1. A rotary motor including a stationary shaft, a rotary cylinder mounted concentric with said shaft, a rotary piston mounted eccentric to said shaft, a partition between said cylinder and said piston, means for timing the admission of and exhaust of gases in said cylinder "and means for exploding the gas to rotate the cylinder and piston, said 2. A rotary motor including a stationary shaft, a rotary cylinder on said shaft, a rotary piston in said cylinder and eccentric to said shaft, a partition between said cylinder and piston, means for timing the admission and exhaust of gases into and from said cylinder, said timing means including valves operated by a tappet rod, a lever to operate the tappet rod and means to operate the lever, said lever operating means including a cam, a shaft on which the cam is mounted and means to rotate the cam and the cam shaft In testimony whereof I afiix mysignatnre.

JAMES J. BRETT. 

